Perhaps you should try some spelling variations:
"pressure research service" » "present research service", "pressure release service", "pressure search service", "pressure research overview", "pressure research section"
"rescue research studies" » "rescue research study", "rescue search studies", "resource research studies", "issue research studies"
"residue research series" » "residues research series", "residual research series", "resident research series", "residue research services", "residue research theories", "residue research summaries"
"tissue research series" » "issues research series", "disease research series", "tissue research services", "tissue research theories", "tissue research summaries"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("rescue research studies") OR ((("tissue research series") OR ("pressure research service"))))) OR ("residue research series")).
• Removing quotes may allow a broader search: (((( rescue research studies ) or ((( tissue research series ) or ( pressure research service ))))) or ( residue research series )).
• Adding a wildcard symbol may retrieve word variants: (((("rescue research studies") or ((("tissue research series") or ("pressure research service"))))) or ("residue research series"))*.